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Preparation method of light-color modified petroleum resin with low softening point

A low softening point, petroleum resin technology, applied in the field of petroleum resin, can solve the problems of rising softening point of resin, and achieve the effects of easy polymerization, improved resin yield and expensive raw materials

Active Publication Date: 2018-11-16
PUYANG RUISEN GASOLINEEUM RESINS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after adding to a certain extent in the raw material, the aromatic vinyl monomer will continue to increase, and the softening point of the resin will increase instead.

Method used

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  • Preparation method of light-color modified petroleum resin with low softening point
  • Preparation method of light-color modified petroleum resin with low softening point
  • Preparation method of light-color modified petroleum resin with low softening point

Examples

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preparation example Construction

[0020]A kind of preparation method of light-colored low-softening point modified petroleum resin, comprises the following steps: 1, the preparation of raw material, chooses the by-product C5 fraction of petroleum cracking to make ethylene and refines C5 after pretreatment as raw material; Choose aromatic vinyl monomer One or more of them account for 5% to 50% of the refined C5 raw material in terms of mass percentage as a polymerization modifier; the aromatic vinyl monomer of the polymerization modifier is selected from styrene, α-methylbenzene One or several kinds of aromatic vinyl monomers such as ethylene, p-methylstyrene, ethylstyrene, tert-butylstyrene, etc.; choose a composite catalyst accounting for 0.2-3.0% of the total raw material amount calculated by mass percentage , the composite catalyst is solid AlCl 3 The catalyst is added to the solvent, and the electron donor is added under stirring to form a liquid catalyst; 2. The above raw materials are added to the solven...

Embodiment 1

[0024] Add 500 g of xylene and 18 g of self-made composite catalyst in the reaction kettle and stir evenly, then mix 1000 g of the pretreated polymerization raw material C5 cut (see Table 1) and 240 g of methyl styrene and drop them into the catalyst system, and control the dropwise Acceleration, keep the reaction temperature at about 60°C, and the reaction time is 3h; after the reaction, the polymerization liquid is washed twice with water and once with alkali, and the polymerization liquid after removing the catalyst is distilled at 220°C under normal pressure to distill out low-boiling fractions, and then in The oligomer was removed by vacuum distillation at 230°C to obtain a light-colored low softening point modified petroleum resin with a yield of 68%, a color number (Fe-Co) of 2#, a softening point of 21°C and a molecular weight distribution of 1.32. See Table 1 for the composition table of the C5 fraction of the polymerization raw material after pretreatment.

[0025] T...

Embodiment 2

[0029] Add 500 g of xylene and 20 g of self-made composite catalyst in the reaction kettle and stir evenly, then mix 1200 g of the pretreated polymerization raw material C5 fraction (see Table 1) and 240 g of methyl styrene and drop them into the catalyst system, and control the dropwise Acceleration, keep the reaction temperature at about 65°C, and the reaction time is 4h; after the reaction, the polymerization solution is washed twice with water and once with alkali, and the polymerization solution after removing the catalyst is distilled at 220°C under normal pressure to distill out low-boiling fractions, and then in The oligomers were removed by vacuum distillation at 230°C to obtain a light-colored low softening point modified petroleum resin with a yield of 72%, a color number (Fe-Co) of 2#, a softening point of 18°C ​​and a molecular weight distribution of 1.35. See Table 2 for the composition table of the C5 fraction of the polymerization raw material after pretreatment...

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Abstract

The invention belongs to the technical field of petroleum resin, and particularly relates to a preparation method of light-color modified petroleum resin with low softening point. The preparation method of the light-color modified petroleum resin with low softening point comprises the following steps of pretreating the byproduct of C5 fraction twice to remove cyclopentadiene and dicyclopentadiene,so as to obtain a mixture which has lower content of cyclopentadiene and contains multiple types of diolefin, monoolefine and alkene, wherein the C5 fraction byproduct is produced in the petroleum cracking process for preparing the ethylene; selecting one or multiple of aromatic vinyl monomers as a polymer modifying agent, selecting a compound catalyst, enabling the olefin in the C5 fraction andthe aromatic vinyl monomers to generate polymerizing reaction under the certain polymerizing condition, effectively controlling the heat of the polymerizing reaction, and slowly performing the reaction, so as to prepare the light-color modified petroleum resin with low softening point with the advantages of stable quality, excellent property and moderate molecular weight.

Description

technical field [0001] The invention belongs to the technical field of petroleum resins, in particular to a preparation method of light-colored low-softening point modified petroleum resins. Background technique [0002] Application of C5 petroleum resin and modified C5 petroleum resin: C5 petroleum resin and modified C5 petroleum resin are generally solid, mainly used in hot melt adhesive, pressure sensitive adhesive, road marking paint, rubber, ink and other fields. Although C5 petroleum resin is widely used and has many advantages, it also has high brittleness and poor film-forming properties. It also has poor viscosity-increasing effect due to the lack of ring structures or polar groups on the molecular chain; in hot melt adhesives and pressure-sensitive adhesives In the application of other fields, in order to improve the wettability and initial viscosity of the glue, white oil or other plasticizers are generally added. During the use of this type of glue, the white oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F240/00
CPCC08F240/00
Inventor 郑奎强赵志宏邢翠萍赵自勋赵振勇宫春雷苏尚忠
Owner PUYANG RUISEN GASOLINEEUM RESINS
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